So after doing a basic search for some of the other “Random Images” and finding very little information I was slightly put off when I found another Random Image post. However, for some reason, I started searching. I translated Serge’s name to Russian which is Сергей Петрович Иванов and …… Wow. I have found a major Russian portraitist – multiple biographies, one on his own webpage, and huge painting dumps and it only took twenty minutes.

I just knew there had to be some good information and images on this artist as long as someone could overcome the language barrier. Thank you so much for your assistance. It is things like this that allow us to provide quality information to our readers. -Ron

You’re not kidding about the language barrier!
English-language Wikipedia has various people by that same name, but apparently not HIM.
One Russian painter was among them, but the dates of birth and death made it obvious that he was somebody else.